Răspuns:
The pen is a writing instrument with viscous ink (paste or gel). It has a small ball at the top, which doses the paste from the tank. There are pens in a wide variety of colors and types of pasta. There are also pens with several mines of different colors. The word pen can also refer to the mechanical pencil. Ballpoint pens can vary in length, shape, and diameter, and are usually made of plastic or metal, while the ballpoint pen is made of brass, steel, ceramic, or tungsten carbide. with a diameter of about 0.7 mm.
